FZHW50 PHFO 171337 CWFHFO Coastal Waters Forecast National Weather Service Honolulu HI 336 AM HST Wed Dec 17 2025 Hawaiian coastal waters within 40 nautical miles including the Hawaiian Islands Humpback Whale National Marine Sanctuary. 336 AM HST Wed Dec 17 2025 .Synopsis for Hawaiian coastal waters... A cold front just NW of Kauai waters will drift over Kauai and stall near Oahu tonight. Moderate to locally strong southerly winds will hold over the western half of the state ahead of the front before easing to light to gentle speeds tonight and Thursday. Overlapping swells will elevate seas to 10 ft over the western half of the state today. Isolated thunderstorms and heavy showers remain possible mainly over Kauai and Oahu waters through Thursday. A strong high pressure system will build N of the state Friday allowing light to moderate trades to return and gradually strengthen to moderate to strong speeds Sunday into early next week.
Kauai Northwest Waters- 337 AM HST Wed Dec 17 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY THURSDAY MORNING...
TODAY West southwest winds 10 to 15 knots. Seas 11 to 12 feet. Wave Detail: West northwest 9 feet at 12 seconds. Occasional showers with isolated thunderstorms.
TONIGHT West winds 10 to 15 knots, becoming 7 to 10 knots after midnight. Seas 10 to 11 feet. Wave Detail: West northwest 8 feet at 12 seconds. Numerous showers. Isolated thunderstorms after midnight.
THURSDAY West southwest winds 7 to 10 knots, backing to southwest 10 to 15 knots in the afternoon. Seas 10 to 12 feet. Wave Detail: Northwest 9 feet at 14 seconds. Occasional showers with isolated thunderstorms.
THURSDAY NIGHT Winds variable less than 10 knots, becoming south southeast to 10 knots after midnight. Seas 10 to 12 feet. Wave Detail: North northwest 9 feet at 13 seconds. Occasional showers with isolated thunderstorms.
FRIDAY Southwest winds 10 to 15 knots. Seas 9 to 10 feet. Wave Detail: North northwest 8 feet at 12 seconds. Isolated thunderstorms in the morning. Numerous showers.
FRIDAY NIGHT Winds variable less than 10 knots. Seas 8 to 10 feet. Wave Detail: North 7 feet at 12 seconds. Numerous showers, mainly in the evening.
SATURDAY East winds 7 to 10 knots, becoming east northeast to 15 knots after midnight. Seas 7 to 10 feet. Wave Detail: North northwest 6 feet at 14 seconds. Scattered showers.
SUNDAY East winds 15 to 20 knots. Seas 6 to 8 feet. Wave Detail: North 5 feet at 12 seconds and east southeast 3 feet at 8 seconds. Scattered showers. Winds and seas higher in and near tstms.
Kauai Windward Waters- 337 AM HST Wed Dec 17 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY THURSDAY MORNING...
TODAY Southwest winds 15 to 20 knots. Seas 9 to 12 feet. Wave Detail: West northwest 9 feet at 12 seconds. Occasional showers with isolated thunderstorms.
TONIGHT West winds 10 to 15 knots, backing to west southwest 7 to 10 knots after midnight. Seas 9 to 12 feet. Wave Detail: West northwest 8 feet at 12 seconds. Occasional showers with isolated thunderstorms.
THURSDAY West southwest winds 10 to 15 knots. Seas 9 to 12 feet. Wave Detail: North northwest 9 feet at 13 seconds. Occasional showers with isolated thunderstorms.
THURSDAY NIGHT South southwest winds 7 to 10 knots. Seas 10 to 12 feet. Wave Detail: North northwest 9 feet at 13 seconds. Occasional showers with isolated thunderstorms.
FRIDAY Southwest winds 7 to 10 knots. Seas 9 to 10 feet. Wave Detail: North northwest 8 feet at 12 seconds. Isolated thunderstorms in the morning. Occasional showers.
FRIDAY NIGHT Winds variable less than 10 knots. Seas 9 to 10 feet. Wave Detail: North northwest 7 feet at 12 seconds. Numerous showers, mainly in the evening.
SATURDAY East winds 7 to 10 knots, backing to east northeast 10 to 15 knots after midnight. Seas 8 to 10 feet. Wave Detail: North 7 feet at 13 seconds. Scattered showers.
SUNDAY East winds to 15 knots, rising to 20 knots. Seas 7 to 8 feet. Wave Detail: North 5 feet at 12 seconds and east southeast 3 feet at 8 seconds. Scattered showers. Winds and seas higher in and near tstms.
Kauai Leeward Waters- 337 AM HST Wed Dec 17 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY THURSDAY MORNING...
TODAY Southwest winds 15 to 20 knots, becoming west southwest 10 to 15 knots this afternoon. Seas 8 to 11 feet. Wave Detail: West northwest 9 feet at 12 seconds. Occasional showers with isolated thunderstorms.
TONIGHT West winds 10 to 15 knots, becoming 7 to 10 knots after midnight. Seas 7 to 10 feet. Wave Detail: West northwest 7 feet at 12 seconds. Numerous showers with isolated thunderstorms.
THURSDAY Winds variable less than 10 knots, becoming west southwest 7 to 10 knots in the afternoon. Seas 8 to 11 feet. Wave Detail: North northwest 9 feet at 13 seconds. Occasional showers with isolated thunderstorms.
THURSDAY NIGHT South southwest winds 7 to 10 knots. Seas 8 to 11 feet. Wave Detail: North northwest 8 feet at 13 seconds. Occasional showers with isolated thunderstorms.
FRIDAY South southwest winds to 10 knots. Seas 6 to 9 feet. Wave Detail: North northwest 8 feet at 12 seconds. Numerous showers with isolated thunderstorms in the morning, then scattered showers in the afternoon.
FRIDAY NIGHT Winds variable less than 10 knots, becoming east southeast 7 to 10 knots after midnight. Seas 6 to 9 feet. Wave Detail: North northwest 7 feet at 12 seconds. Numerous showers, mainly in the evening.
SATURDAY East winds 10 to 15 knots. Seas 5 to 8 feet. Wave Detail: North northwest 6 feet at 12 seconds. Scattered showers.
SUNDAY East winds 15 to 20 knots. Seas 5 to 8 feet. Wave Detail: North 5 feet at 12 seconds and east southeast 3 feet at 8 seconds. Scattered showers. Winds and seas higher in and near tstms.
Kauai Channel- 337 AM HST Wed Dec 17 2025
...SMALL CRAFT ADVISORY IN EFFECT THROUGH EARLY THURSDAY MORNING...
TODAY Southwest winds 20 to 25 knots. Seas 5 to 8 feet. Wave Detail: West northwest 5 feet at 12 seconds. Occasional showers with isolated thunderstorms.
TONIGHT West southwest winds 10 to 15 knots, becoming 7 to 10 knots after midnight. Seas 6 to 9 feet. Wave Detail: West northwest 5 feet at 12 seconds. Occasional showers with isolated thunderstorms.
THURSDAY Southwest winds 10 to 15 knots, rising to 15 to 20 knots in the afternoon. Seas 5 to 7 feet, building to 6 to 9 feet in the afternoon. Wave Detail: Northwest 6 feet at 13 seconds. Occasional showers with isolated thunderstorms.
THURSDAY NIGHT Southwest winds to 10 knots. Seas 6 to 9 feet. Wave Detail: North northwest 7 feet at 13 seconds. Occasional showers with isolated thunderstorms.
FRIDAY South winds 7 to 10 knots. Seas 5 to 8 feet. Wave Detail: North northwest 7 feet at 12 seconds. Numerous showers with isolated thunderstorms in the morning, then scattered showers in the afternoon.
FRIDAY NIGHT Winds variable less than 10 knots. Seas 5 to 8 feet. Wave Detail: North northwest 7 feet at 12 seconds. Numerous showers, mainly in the evening.
SATURDAY East southeast winds 7 to 10 knots, backing to east northeast 10 to 15 knots. Seas 5 to 8 feet. Wave Detail: North northwest 6 feet at 12 seconds. Scattered showers.
SUNDAY East northeast winds 15 to 20 knots. Seas 5 to 8 feet. Wave Detail: North 5 feet at 12 seconds and east southeast 3 feet at 8 seconds. Scattered showers. Winds and seas higher in and near tstms.
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